Neumann KM 140 (KM 100 + 40 capsule)

🎤 Core description

The KM 140 is not a single-piece mic in the traditional sense—it’s a combination system made up of:

• KM 100 output stage (body / electronics)
• AK 40 cardioid capsule

This modular design allows engineers to swap capsules for different polar patterns and applications, making it highly versatile.

🧠 Sound & character

• Highly transparent and accurate
• Smooth frequency response with minimal coloration
• Tight, focused pickup due to its cardioid pattern
• Excellent off-axis rejection

👉 Compared to newer KM 184s, many engineers find the KM 140 slightly more natural and less hyped on the top end (a bit more “classic Neumann”).

The KM 140 excels in applications where clarity and realism matter:

• Acoustic guitar
• Piano
• Drum overheads
• Strings and orchestral recording
• Stereo pairs (XY / ORTF setups)

👉 It’s especially strong in classical and acoustic music, where capturing the true tone of the instrument and room is critical.

🧩 Why it’s respected

• Part of Neumann’s first modular small-diaphragm system
• Flexible and future-proof design
• Consistently low self-noise and high output capability
• Still widely used decades after its introduction

🎯 Bottom line

The KM 140 is a serious, no-nonsense recording microphone:

• Built for accuracy, not hype
• Extremely versatile due to its modular system
• A staple in professional studios—especially for acoustic and ensemble work